/Engine/Source/Runtime/Engine/Classes/Materials/MaterialExpressionSkyAtmosphereLightIlluminance.h
class UMaterialExpressionSkyAtmosphereLightDiskLuminance : public [UMaterialExpression](API\Runtime\Engine\Materials\UMaterialExpression)
FExpressionInpu...
DiskAngularDiameterOverride
Override the angular diameter of the disk in degree.
int32
LightIndex
Indexof the atmosphere light to sample.